JPS62248829A - Structure of cylinder head of v-engine - Google Patents

Structure of cylinder head of v-engine

Info

Publication number
JPS62248829A
JPS62248829A JP61093941A JP9394186A JPS62248829A JP S62248829 A JPS62248829 A JP S62248829A JP 61093941 A JP61093941 A JP 61093941A JP 9394186 A JP9394186 A JP 9394186A JP S62248829 A JPS62248829 A JP S62248829A
Authority
JP
Japan
Prior art keywords
cylinder head
camshaft
cover member
cylinder
chain belt
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP61093941A
Other languages
Japanese (ja)
Other versions
JPH0672548B2 (en
Inventor
Koji Asaumi
皓二 浅海
Masatoshi Okada
正敏 岡田
Masahiro Chiyoushi
調枝　昌博
Ryoji Abe
良治 阿部
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mazda Motor Corp
Original Assignee
Mazda Motor Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mazda Motor Corp filed Critical Mazda Motor Corp
Priority to JP61093941A priority Critical patent/JPH0672548B2/en
Priority to US07/040,908 priority patent/US4729348A/en
Publication of JPS62248829A publication Critical patent/JPS62248829A/en
Publication of JPH0672548B2 publication Critical patent/JPH0672548B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B75/00—Other engines
    • F02B75/16—Engines characterised by number of cylinders, e.g. single-cylinder engines
    • F02B75/18—Multi-cylinder engines
    • F02B75/22—Multi-cylinder engines with cylinders in V, fan, or star arrangement
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/02—Valve drive
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/02—Valve drive
    • F01L1/022—Chain drive
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/02—Valve drive
    • F01L1/024—Belt drive
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/02—Valve drive
    • F01L1/04—Valve drive by means of cams, camshafts, cam discs, eccentrics or the like
    • F01L1/047—Camshafts
    • F01L1/053—Camshafts overhead type
    • F01L2001/0537—Double overhead camshafts [DOHC]
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B75/00—Other engines
    • F02B75/16—Engines characterised by number of cylinders, e.g. single-cylinder engines
    • F02B75/18—Multi-cylinder engines
    • F02B2075/1804—Number of cylinders
    • F02B2075/1824—Number of cylinders six
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B2275/00—Other engines, components or details, not provided for in other groups of this subclass
    • F02B2275/08—Endless member is a chain
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B2275/00—Other engines, components or details, not provided for in other groups of this subclass
    • F02B2275/18—DOHC [Double overhead camshaft]
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F7/00—Casings, e.g. crankcases or frames
    • F02F7/006—Camshaft or pushrod housings

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)

Abstract

PURPOSE:To commonly use a cylinder head by separately forming said cylinder head from a cover member and enabling one end of a cam shaft to be projected out of both end parts in the longitudinal direction of said cylinder head. CONSTITUTION:Through holes 8 for inserting cam shafts are provided on the wall parts on both sides in the longitudinal direction of each of cylinder heads 2, 3, to rotatably hold cam shafts 5, 6 in such a way that their front ends project forward out of the front side through holes 8. A first cover member 12 is provided on the front side of each cylinder head 2, 3 enabling both cam pulleys 9 to be positioned on the front side of an engine.Thereby, a crank pulley 10 and a chain belt 11 can be collectively arranged on the front side of the engine, and both cylinder heads can be placed in a mutually inverted form as viewed in a plan, enabling a cylinder head to be commonly used without difficulty.

Description

【発明の詳細な説明】 （産業上の利用分野） 本発明はＶ型エンジンのシリンダヘッド構造に関し、特
に左右のバンクに配置されるシリンダヘッドの共通化に
関する。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a cylinder head structure for a V-type engine, and particularly to the commonality of cylinder heads arranged in left and right banks.

（従来の技術） 従来、Ｖ型エンジンのシリンダヘッド構造として、例え
ば特開昭５８−１１９９２９号公報に開示されるように
、左右両バンクのシリンダヘッド内にカム軸を軸支し、
シリンダヘッドの前端部に突出したカム軸にカムプーリ
を取付け、該カムプーリとクランクプーリとの間にチェ
ンベルトを巻掛けてクランク軸によりカム軸を駆動する
一方、シリンダヘッドに上記チェンベルトを覆うチェン
ケースを一体的に設けるようにしたものが知られている
。(Prior Art) Conventionally, as a cylinder head structure of a V-type engine, as disclosed in Japanese Patent Application Laid-Open No. 58-119929, a camshaft is pivotally supported in cylinder heads of both left and right banks.
A cam pulley is attached to the camshaft protruding from the front end of the cylinder head, a chain belt is wound between the cam pulley and the crank pulley, and the camshaft is driven by the crankshaft, while a chain case that covers the chain belt is attached to the cylinder head. There is a known device in which the is integrally provided.

（発明が解決しようとする問題点） ところで、このような■型エンジンでは、左右のバンク
のシリンダヘッドの形状が類似することから、両シリン
ダヘッドを共通化して部品管理ニ数の低減等を図ること
が考えられる。(Problem to be Solved by the Invention) Incidentally, in such a ■-type engine, the shapes of the cylinder heads of the left and right banks are similar, so both cylinder heads are made common to reduce the number of parts to be managed. It is possible that

しかし、この場合、左右のシリンダヘッドのバンク中央
に関する対称性から、共通のシリンダヘッドを、左右バ
ンクに平面視で互いに反転させた状態に配置することに
なるので、一方のバンクではシリンダヘッドの前側にチ
ェンケースが配置されるが他方のバンクではシリンダヘ
ッドの後側にチェンケースが配置されることになり、カ
ムプーリの駆動系のレイアウトが困難になる。However, in this case, due to the symmetry of the left and right cylinder heads with respect to the center of the bank, a common cylinder head will be placed in the left and right banks so that they are inverted from each other in plan view. The chain case is placed in one bank, but in the other bank, the chain case is placed behind the cylinder head, making the layout of the cam pulley drive system difficult.

また、チェンケースをシリンダヘッドに一体的に設けら
れているので、このチェンケースの幅に応じてシリンダ
ヘッドの幅が大きなものになり、エンジンのコンパクト
性が損われるという問題をも有している。In addition, since the chain case is integrally provided with the cylinder head, the width of the cylinder head increases in proportion to the width of the chain case, which causes a problem in that the compactness of the engine is impaired. .

本発明はかかる点に鑑みてなされたものであり、その目
的とするところは、シリンダブロックとチェンケースと
を別個のものに形成することにより、シリンダヘッドの
幅を大きくすることなく左右両バンクのシリンダヘッド
を無理なく共通化することにある。The present invention has been made in view of the above, and its object is to form the cylinder block and chain case separately, thereby making it possible to accommodate both left and right banks without increasing the width of the cylinder head. The objective is to standardize the cylinder head without any difficulty.

（問題点を解決するための手段） 上記目的を達成するため、本発明の解決手段は、左右台
バンクに平面視で互いに反転させた状態に配置され、長
手方向両端部にカム軸挿通用の貫通孔を有するシリンダ
ヘッドと、該各シリンダヘッド内に、それぞれ一端を−
［記シリンダヘッドの同一側の貫通孔から外方へ突出せ
しめて軸支されたカム軸と、該各カム軸の貫通孔より突
出する突出部に取付けられたカムプーリと、該両カムプ
ーリに亘って巻掛けられ、クランク軸の回転を各カムプ
ーリに伝達するチェンベルトと、Ｅ記名シリンダヘッド
のカム軸が突出する側に配置され、該各シリンダヘッド
との間にチＩンベルトを覆う閉断面空間を形成する第１
カバー部材と、上記各シリンダヘッドのカム軸が突出す
る側と反対側に配置された第２カバー部材とを備える構
成としたものである。(Means for Solving the Problems) In order to achieve the above object, the solving means of the present invention is such that the left and right base banks are arranged in a state that they are inverted from each other in a plan view, and a camshaft is inserted at both ends in the longitudinal direction. A cylinder head having a through hole, and one end inserted into each cylinder head.
[A camshaft supported outwardly from a through hole on the same side of the cylinder head, a cam pulley attached to a protrusion projecting from the through hole of each camshaft, and a cam pulley extending between both cam pulleys. A chain belt that is wrapped around the chain belt and transmits the rotation of the crankshaft to each cam pulley is arranged on the side from which the camshaft of the E-registered cylinder head projects, and a closed cross-sectional space that covers the chain belt is provided between the chain belt and each cylinder head. first to form
The cylinder head is configured to include a cover member and a second cover member disposed on the side opposite to the side from which the camshaft of each cylinder head protrudes.

（作用） 上記の構成により、本発明では、各シリンダヘッドの長
手方向両端部に設けられた貫通孔を利用して、シリンダ
ヘッドの同一側にカム軸の一端を突出させることができ
るので、カムプーリがエンジンの同一側に位置して各カ
ム軸のチェン駆動系のレイアウトを容易に行うことがで
き、両シリンダヘッドの共通化が無理なく行えることに
なる。(Function) With the above configuration, in the present invention, one end of the camshaft can be made to protrude to the same side of the cylinder head by using the through holes provided at both ends in the longitudinal direction of each cylinder head. are located on the same side of the engine, making it easy to layout the chain drive system for each camshaft, and making it possible to easily share both cylinder heads.

また、シリンダヘッドと第１カバー部材とは別体である
ので、シリンダヘッドの幅が大きくならず、エンジンが
コンパクトなものになる。Furthermore, since the cylinder head and the first cover member are separate bodies, the width of the cylinder head does not become large, making the engine compact.

さらに、第２カバー部材により、突出しない側のカム軸
周りのオイルシール性が確保されることになる。Furthermore, the second cover member ensures oil sealing around the camshaft on the side that does not protrude.

（実施例） 以下、本発明の実施例を図面に基づいて説明する。(Example) Embodiments of the present invention will be described below based on the drawings.

第１図および第２図は本発明の実施例に係るシリンダヘ
ッド構造を備えたＶ型エンジンを示す。1 and 2 show a V-type engine equipped with a cylinder head structure according to an embodiment of the present invention.

１はシリンダブロック、２．３はそれぞれ該シリンダブ
ロック１上に配設された左バンクＬおよび右バンクＲの
シリンダヘッドであって、該シリンダブロック１と各バ
ンクＬ、Ｒのシリンダヘッド２，３との間にはそれぞれ
３つの気筒４，４．４が設けられている。上記右バンク
Ｒのシリンダヘッド３は、左バンクＬのシリンダヘッド
２と同一のものであって、左右両バンクＬ、Ｒに平面視
で前後を互いに反転させた状態に配置されたものである
。1 is a cylinder block, and 2.3 is a cylinder head of a left bank L and a right bank R disposed on the cylinder block 1, respectively. Three cylinders 4, 4.4 are provided between the two. The cylinder head 3 of the right bank R is the same as the cylinder head 2 of the left bank L, and is arranged in both the left and right banks L and R with the front and back sides reversed in plan view.

また、上記各バンクＬ、Ｒのシリンダヘッド２゜３上に
は上記各気筒４の吸気弁を駆動する吸気専用カム軸５と
排気弁を駆動する排気専用カム軸６とが気筒列と平行に
配置されている。各シリンダヘッド２．３の上面には各
カム５．６を軸支する軸受部７８〜７ｅが設けられてい
るとともに、各シリンダヘッド２．３の長手方向両端部
つまり前端の軸受部（左バンクしでは７ａ、右バンクＲ
では７ｅ）の前側の前壁部と、後端の軸受部（７８また
は７ａ）の後側の後壁部とには、上記各カム軸５，６が
挿通可能な半円形の貫通孔８，８・・・が段けられてい
る。そして、上記各カム軸５，６は、それぞれ前端を上
記各シリンダヘッド２．３の同一側（前端）の貫通孔８
，８から外方（前方）へ−６、− 突出せしめて上記軸受部７ａ〜７ｅに軸支されている。Further, on the cylinder heads 2° 3 of each bank L and R, there are an intake camshaft 5 for driving the intake valves of each cylinder 4 and an exhaust camshaft 6 for driving the exhaust valves, which are parallel to the cylinder rows. It is located. Bearings 78 to 7e for pivotally supporting each cam 5.6 are provided on the upper surface of each cylinder head 2.3, and bearings 78 to 7e at both longitudinal ends of each cylinder head 2.3, that is, at the front end (left bank Shide 7a, right bank R
In this case, the front wall part on the front side of 7e) and the rear wall part on the rear side of the rear end bearing part (78 or 7a) have semicircular through holes 8 through which the respective camshafts 5 and 6 can be inserted. 8... are stacked. Each of the camshafts 5 and 6 has its front end connected to a through hole 8 on the same side (front end) of each of the cylinder heads 2.3.
, 8 to the outside (front) -6, - and are pivotally supported by the bearings 7a to 7e.

一方、上記各カム軸５．６の前端、つまり前側の貫通孔
８．８からシリンダヘッド２．３の外方（＃方）に突出
する各突出部５ａ、６ａにはそれぞれカムプーリ９が取
付けられており、該各カムプーリ９とクランクプーリ１
０との間には各バンクＬ、Ｒごとにクランク軸の回転を
各カムプーリ９．９に伝達するヂエンベルト１１が巻掛
けられていて、各気筒４の吸・排気弁が所定タイミング
で開閉するよう各カム軸５．６を駆動するようにしてい
る。On the other hand, cam pulleys 9 are attached to the front ends of each of the camshafts 5.6, that is, to the protrusions 5a and 6a that protrude from the front through hole 8.8 to the outside (# direction) of the cylinder head 2.3. and each cam pulley 9 and crank pulley 1
A chain belt 11 is wound between each bank L and R for transmitting the rotation of the crankshaft to each cam pulley 9.9, so that the intake and exhaust valves of each cylinder 4 open and close at predetermined timing. Each camshaft 5.6 is driven.

さらに、上記各シリンダヘッド２，３の前側には、上記
各チェンベルト１１を覆う第１カバー部材１２が配置さ
れている。第１図に示すように、該第１カバー部材１２
は、後方に開口を有する袋状に形成されていて、各シリ
ンダヘッド２．３の前壁部との間にチェンベル１〜１１
を覆う閉断面空間１３が形成されている。また、上記第
１カバー部材１２の開口周縁には、該第１カバー部材１
２を上記シリンダヘッド２，３に取付けるボルト１５を
挿通するためのボルト穴が形成されているとともに、第
１カバー部材１２の左右のシール面１２ａ、１２ａが、
第１カバー部材１２の幅がチェンベルト１１の後方でシ
リンダヘッド２，３の幅に一致するよう上記開口に向っ
て湾曲して形成されており、よって第１カバー部材１２
外縁のシール面１２ａ、１２ａよりも内側にボルト・１
１．１１・・・が配置されるようになされている。Further, on the front side of each of the cylinder heads 2 and 3, a first cover member 12 that covers each of the chain belts 11 is arranged. As shown in FIG. 1, the first cover member 12
The chambers 1 to 11 are formed in a bag shape with an opening at the rear, and the chambers 1 to 11 are connected to the front wall of each cylinder head 2.3.
A closed cross-sectional space 13 is formed that covers the. Further, at the opening periphery of the first cover member 12, the first cover member 1
A bolt hole is formed for inserting a bolt 15 for attaching the first cover member 12 to the cylinder head 2, 3, and the left and right sealing surfaces 12a, 12a of the first cover member 12 are
The width of the first cover member 12 is curved toward the opening so that it matches the width of the cylinder heads 2 and 3 behind the chain belt 11.
Seal surface 12a on the outer edge, bolt 1 inside than 12a
1.11... are arranged.

また、上記第１カバー部材１２の前面には、上記ボルト
１１．１１・・・をエンジン前方に露出せしめるサービ
スホール１６が開口されており、第１カバー部材１２の
前面にはこのサービスホール１６を塞ぐサービスカバー
１７が取外し可能に取付けられている。Further, a service hole 16 is opened in the front surface of the first cover member 12 to expose the bolts 11, 11, . . . to the front of the engine. A closing service cover 17 is removably attached.

また、上記各シリンダヘッド２，３の後側つまりカム軸
５．６が突出する側と反対側には、後側の貫通孔８．８
を覆う第２カバー部材１４が配置されていて、カム軸５
．６と貫通孔８．８との間から後側に流出したオイルが
外方に漏れるのを防止するようにしている。Further, on the rear side of each cylinder head 2, 3, that is, on the side opposite to the side from which the camshaft 5.6 protrudes, a rear through hole 8.8 is provided.
A second cover member 14 is disposed to cover the camshaft 5.
．． 6 and the through hole 8.8 to the rear side is prevented from leaking outward.

したがって、上記実施例においては、シリンダヘッド２
．３の長手方向両側の壁部にカム軸挿通用の貫通孔８．
８・・・を設け、カム軸５．６をその前端が前側の貫通
孔８．８から前方に突出するよう軸支し、各シリンダヘ
ッド２．３の前側に第１カバー部材１２を配置して、カ
ムプーリ９，９が共にエンジンの前側に位置するように
したので、クランクプーリ１０およびチェンベルト１１
をエンジンの前側に集中してレイアウトすることができ
るようになり、両シリンダヘッド２．３を平面視で互い
に反転させた状態で配置でき、その共通化を無理なく実
現することができる。Therefore, in the above embodiment, the cylinder head 2
．． Through holes 8 for camshaft insertion are provided in the walls on both sides in the longitudinal direction of 3.
8..., the camshaft 5.6 is pivotally supported so that its front end projects forward from the front through hole 8.8, and the first cover member 12 is arranged on the front side of each cylinder head 2.3. Since the cam pulleys 9 and 9 are both located on the front side of the engine, the crank pulley 10 and chain belt 11
The cylinder heads 2.3 can be laid out in a concentrated manner on the front side of the engine, and both cylinder heads 2.3 can be arranged inverted with respect to each other in plan view, making it possible to easily realize their commonality.

また、シリンダヘッド２．３と第１カバー部材１２とは
別体であるので、第１カバー部材１２のシール面１２ａ
を開口に向って湾曲して形成する′□ことにより、シリ
ンダヘッド２．３の幅が太き、（ならず、エンジンをコ
ンパクトなものにすることができる。Further, since the cylinder head 2.3 and the first cover member 12 are separate bodies, the sealing surface 12a of the first cover member 12
By forming the cylinder head 2.3 to be curved toward the opening, the width of the cylinder head 2.3 is increased, and the engine can be made more compact.

さらに、各シリンダヘッド２．３の後側に第２カバー部
材１４を配置したので、各シリンダヘッド後部のカム軸
周りのオイルシール性を確保することができる。Furthermore, since the second cover member 14 is disposed at the rear side of each cylinder head 2.3, oil sealing around the camshaft at the rear of each cylinder head can be ensured.

また、第１カバー部材１２のシール面１２ａ。Further, the sealing surface 12a of the first cover member 12.

１２ａよりも内側にボルト１５．’１５・・・を配置し
たので、このボルト１５．１５・・・が嵌入するシリン
ダヘッド側のボルト穴が互いに接近して配置される。こ
のことによりシリンダヘッド側のボルト穴も互いに接近
して配置され、シリンダヘッド２゜３の幅が小さなもの
になってエンジンをコンパクト化することができる。Bolt 15 on the inside of 12a. Since the bolts 15, 15, and so on are arranged, the bolt holes on the cylinder head side into which the bolts 15, 15, and so on are inserted are arranged close to each other. As a result, the bolt holes on the cylinder head side are also arranged close to each other, and the width of the cylinder head 2.3 is reduced, making it possible to make the engine more compact.

また、上記ボルト１５．１５・・・の締付は性を確保す
るために第１カバー部材１２の前面にサービスホール１
６を設け、このサービスホール１６にサービスカバー１
７を取外し可能に取付けたので、チェンベルト１１の張
り力調整などのチェンメンテナンス時、このサービスカ
バー１７を取外すことにより簡易にメンテナンスができ
、チェンメンテナンス性を確保することができる。In addition, in order to ensure proper tightening of the bolts 15, 15, etc., service holes are provided in the front surface of the first cover member 12.
6, and a service cover 1 is installed in this service hole 16.
7 is removably attached, maintenance can be easily performed by removing this service cover 17 during chain maintenance such as tension adjustment of the chain belt 11, and chain maintainability can be ensured.

（発明の効果） 以上説明したように、本発明の■型エンジンのシリンダ
ヘッド構造によれば、シリンダヘッドと、チェンベルト
を覆うカバー部材とを別体に形成するとともに、カムプ
ーリを取付けるカム軸の一端をシリンダヘッドの長手方
向両端部のいずれにも突出できるようにしたので、シリ
ンダヘッドの幅を大きくすることなく左右両バンクのシ
リンダへラドを共通化することができるものである。(Effects of the Invention) As explained above, according to the cylinder head structure of the ■ type engine of the present invention, the cylinder head and the cover member that covers the chain belt are formed separately, and the camshaft on which the cam pulley is attached is formed. Since one end can protrude to either end in the longitudinal direction of the cylinder head, it is possible to share the same radius for the cylinders of both left and right banks without increasing the width of the cylinder head.

【図面の簡単な説明】[Brief explanation of drawings]

図面は本発明の実施例を示し、第１図はＶ型エンジンの
正面図、第２図は同平面図である。 ２．３・・・シリンダヘッド、５．６・・・カム軸、８
・・・貫通孔、９・・・カムプーリ、１１・・・チェン
ベルト、１２・・・第１カバー部材、１３・・・閉断面
空間、１４・・・第２カバー部材、し・・・左バンク、
Ｒ・・・右バンク。 特許出願人　　　　マツダ株式会社 ｅ、７７Ｃ（ｊ’ 代　　理　　人　　　　　弁理士　　前　　１）　　弘
　１１１゛ ゛（。 ′□Ｌ＋−＋The drawings show an embodiment of the present invention, and FIG. 1 is a front view of a V-type engine, and FIG. 2 is a plan view thereof. 2.3...Cylinder head, 5.6...Camshaft, 8
...Through hole, 9...Cam pulley, 11...Chain belt, 12...First cover member, 13...Closed section space, 14...Second cover member,...Left bank,
R...Right bank. Patent applicant Mazda Motor Corporation e,77C (j' Agent Patent attorney former 1) Hiroshi 111゛゛(.'□L+-+

Claims (1)

【特許請求の範囲】[Claims] （１）左右各バンクに平面視で互いに反転させた状態に
配置され、長手方向両端部にカム軸挿通用の貫通孔を有
するシリンダヘッドと、該各シリンダヘッド内に、それ
ぞれ一端を上記シリンダヘッドの同一側の貫通孔から外
方へ突出せしめて軸支されたカム軸と、該各カム軸の貫
通孔より突出する突出部に取付けられたカムプーリと、
該両カムプーリに亘って巻掛けられ、クランク軸の回転
を各カムプーリに伝達するチェンベルトと、上記各シリ
ンダヘッドのカム軸が突出する側に配置され、該各シリ
ンダヘッドとの間にチェンベルトを覆う閉断面空間を形
成する第１カバー部材と、上記各シリンダヘッドのカム
軸が突出する側と反対側に配置された第２カバー部材と
を備えたことを特徴とするＶ型エンジンのシリンダヘッ
ド構造。(1) A cylinder head is arranged in each left and right bank so as to be inverted from each other in a plan view, and has a through hole for inserting a camshaft at both ends in the longitudinal direction, and one end of the cylinder head is inserted into each cylinder head. a camshaft that is pivotally supported and projects outward from a through hole on the same side of the camshaft, and a cam pulley that is attached to a protrusion that protrudes from the through hole of each of the camshafts;
A chain belt is wound around both the cam pulleys and transmits the rotation of the crankshaft to each cam pulley, and a chain belt is disposed on the side from which the camshaft of each cylinder head projects, and the chain belt is arranged between the cylinder head and the chain belt. A cylinder head for a V-type engine, comprising: a first cover member forming a closed cross-sectional space to cover; and a second cover member disposed on a side opposite to the side from which the camshaft of each cylinder head projects. structure.
JP61093941A 1986-04-23 1986-04-23 V-type engine cylinder head structure Expired - Lifetime JPH0672548B2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP61093941A JPH0672548B2 (en) 1986-04-23 1986-04-23 V-type engine cylinder head structure
US07/040,908 US4729348A (en) 1986-04-23 1987-04-21 Cylinder head structure for V-type engine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP61093941A JPH0672548B2 (en) 1986-04-23 1986-04-23 V-type engine cylinder head structure

Publications (2)

Publication Number Publication Date
JPS62248829A true JPS62248829A (en) 1987-10-29
JPH0672548B2 JPH0672548B2 (en) 1994-09-14

Family

ID=14096457

Family Applications (1)

Application Number Title Priority Date Filing Date
JP61093941A Expired - Lifetime JPH0672548B2 (en) 1986-04-23 1986-04-23 V-type engine cylinder head structure

Country Status (2)

Country Link
US (1) US4729348A (en)
JP (1) JPH0672548B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2016160833A (en) * 2015-03-02 2016-09-05 トヨタ自動車株式会社 Internal combustion engine

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1204999B (en) * 1987-05-06 1989-03-10 Catene Calibrate Regina PRE-PHASED DISTRIBUTION GROUP IN PARTICULAR FOR INTERNAL COMBUSTION ENGINES
US4915066A (en) * 1988-07-20 1990-04-10 Mazda Motor Corporation Valve train for V-type double-overhead-camshaft engine
JPH0612212Y2 (en) * 1988-11-15 1994-03-30 日産工機株式会社 Engine chain case device
JPH02169809A (en) * 1988-12-21 1990-06-29 Nissan Motor Co Ltd Cam shaft drive device for dohc engine
JP2530930Y2 (en) * 1988-12-22 1997-04-02 日産自動車株式会社 Drive transmission device
JPH02173303A (en) * 1988-12-26 1990-07-04 Nissan Motor Co Ltd Cam-shaft driving device of dohc engine
DE3901721A1 (en) * 1989-01-21 1990-08-02 Daimler Benz Ag V-DESIGN INTERNAL COMBUSTION ENGINE
JPH02241928A (en) * 1989-03-15 1990-09-26 Nissan Motor Co Ltd Chain cover device for v-shaped engine
JPH082403Y2 (en) * 1989-05-22 1996-01-29 トヨタ自動車株式会社 Thrust bearing structure for both camshaft and assembly line
DE3921716A1 (en) * 1989-07-01 1991-01-10 Porsche Ag CAMSHAFT DRIVE OF A MULTI-CYLINDER V-ENGINE
JP4084480B2 (en) * 1998-12-07 2008-04-30 本田技研工業株式会社 V-type internal combustion engine for vehicles
DE10139429A1 (en) * 2001-08-10 2003-02-27 Opel Adam Ag Internal combustion engine with encapsulated timing belt for the camshaft
US7168405B2 (en) * 2004-01-30 2007-01-30 Hartley Jr John J Camshaft drive mechanism
US7258093B2 (en) * 2005-12-01 2007-08-21 Chriswell Shawn D Concave combustion chamber
US9121474B2 (en) 2011-06-30 2015-09-01 Ford Global Technologies, Llc Engine drive system

Family Cites Families (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB103163A (en) * 1916-01-18 1917-01-18 Sunbeam Motor Car Co Ltd Improvements in Cam-shaft-driving Mechanism for Internal Combustion Engines.
US1406271A (en) * 1921-01-17 1922-02-14 Henry C Michelsen Internal-combustion engine
GB557700A (en) * 1942-05-22 1943-12-01 Harold Raymond Morgan A housing for the valve-gear of an internal combustion engine
GB603052A (en) * 1945-11-17 1948-06-08 Jaguar Cars Improved driving means for the cam-shafts of internal-combustion engines
GB604332A (en) * 1945-11-17 1948-07-01 Jaguar Cars Internal-combustion engine with twin overhead camshafts
US3482553A (en) * 1967-07-03 1969-12-09 Gen Motors Corp Internal combustion engine overhead camshaft drive means
GB1289580A (en) * 1969-08-25 1972-09-20
JPS5450718A (en) * 1977-09-29 1979-04-20 Yamaha Motor Co Ltd V-type or horizontally opposed type four cycle engine for motorcycle
JPS5773330U (en) * 1980-10-23 1982-05-06
FR2500559B1 (en) * 1981-02-20 1986-02-28 Honda Motor Co Ltd DEVICE FOR TENSIONING A TIMING CHAIN OF AN INTERNAL COMBUSTION ENGINE
JPS58202315A (en) * 1982-04-30 1983-11-25 Honda Motor Co Ltd Mounting device of cam chain tensioner
JPS5965643A (en) * 1982-10-06 1984-04-13 Honda Motor Co Ltd Balancer of engine for autobicycle
JPS5970820A (en) * 1982-10-15 1984-04-21 Yamaha Motor Co Ltd Engine for motorcycle
JPS59194018A (en) * 1983-04-18 1984-11-02 Mazda Motor Corp V-engine
US4516546A (en) * 1983-04-18 1985-05-14 Mazda Motor Corporation V-Type overhead-camshaft engine
JPH0627486B2 (en) * 1984-05-01 1994-04-13 ヤマハ発動機株式会社 V type engine for automobile
JPS61145306A (en) * 1984-12-20 1986-07-03 Toyota Motor Corp V-6 double overhead camshaft internal-combustion engine
JPH0219521Y2 (en) * 1985-04-17 1990-05-30

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2016160833A (en) * 2015-03-02 2016-09-05 トヨタ自動車株式会社 Internal combustion engine

Also Published As

Publication number Publication date
JPH0672548B2 (en) 1994-09-14
US4729348A (en) 1988-03-08

Similar Documents

Publication Publication Date Title
JPS62248829A (en) Structure of cylinder head of v-engine
JPH0627486B2 (en) V type engine for automobile
JPS61275506A (en) Engine cam shaft driving device
US5052351A (en) Double overhead camshaft bearing structure
JP3184438B2 (en) Internal combustion engine
JPH1089147A (en) Cylinder head structure of internal combustion engine
JPH0941984A (en) Chain driving mechanism of internal combustion engine
JPS5970820A (en) Engine for motorcycle
JPH0235124B2 (en)
JPH02169809A (en) Cam shaft drive device for dohc engine
JP2512768B2 (en) Camshaft drive for V-type DOHC engine
JP2004124746A (en) Camshaft bearing structure for overhead camshaft type internal combustion engine
JPH02169808A (en) Cam shaft drive device for dohc engine
JPH01211622A (en) V-engine
EP0661418B1 (en) Internal combustion engine
JP3156789B2 (en) Valve train for V-type 5-valve engine
JPS59180017A (en) Cam bearing structure of overhead valve type internal-combustion engine
JP2933156B2 (en) V-type engine for automobile
JPS6067705A (en) Cam shaft drive unit in double overhead cam shaft engine
JPS6246802Y2 (en)
JPS62248854A (en) Chain cover device for engine
JPH09250354A (en) 4-cycle engine
JPH02199203A (en) V-type engine
JP2603801Y2 (en) 4-cycle engine for vehicles
JPH02140408A (en) Cam shaft driving device for v-type engine